Siphon pump



Nov. 8, 1927. 1,648,238

W. MODRA ET AL SIPHON PUMP Filed Jan. 22, 1927 Va l 72 INVEA, ro/,

W/LL/AM MODRA #No Patented Nov. j8, 1927.

UNETED j STA 'res Parenteel@ WILLIAM MCDBA ann ALFRED W. Minna, or str. Leurs, Missouni.

Vsrrnolv rUMPx Application filed January 22, 1927. V Serial No. 162,849.

Our invention has relation to improvement-s in siphon pumps, and consists in the novel features of construction more fully set forthin the specification and pointed out in the claim. A

VThe principal object of the invention is to provide a siphon pump iny which the discharge nozzle is adjustable to and'jfrom they injector nozzle so as to adapt the pump to variations in the initialk water pressure. Y

Further objects are to provide means yfor preventing the formation of an air cushion betweenthe injector and discharge nozzle; to provide means for effecting adjustment of the discharge nozzle while the pump is in operation; and to provide the injector with a replaceable bushing. Further and other advantages will be better apparent from a detailed description of the invention in connection with the accompanying drawings, in

which- Figure l is a combined side elevation and siphon pump; Fig. 2 is a vertical longitudinal section taken on the line 2-2 of Figure 1; and Fig. 3 is a horizontal cross-v section taken on the line 3-3 of Figure 1.

Referring to the drawings, l represents the pump housing having upper and lower cylindrical terminals 2 and 3 respectively, each of which terminates in screw threads, those of terminal 2 receiving the fitting 4 of a hose 5 and those of terminal 3 receiving a strainer 6. An invertedgoose-neck 7 is formed integral with the bowl of housing 1, a. part 8 of said goose-neck extending outside of the housing and having a coupling nut 9 mounted on ball-bearings 10 in a raceway 11 contiguous to the outer edge of the goose-neck. The ball-bearings 10 operate to hold the nut 9 in place,and are insertible in the race 11 through a threaded hole 12 in the nut 9, said hole being closed by a `setscrew 13.

A hose H may be connected to the gooseneck 7 by means of said coupling for the purpose of injecting water or steam into the pump housing. This will be more fully eX-g plained when the operation of the pump is described.

The inner end 14 of goose-neck 7 is pointed toward the terminal 2 of the housing, and is provided with a removable bushing or nozzle 15 whose aXisjcoincides with that of the cylindrical terminal 2.

The terminal 2 has two spaced annnlar flanges 'projecting from itsinner-surface, the

ieaaza outer flange 16 being disposed slightly in from they end ofthe terminal and the inner flange 17 being at the base thereof andhaving internal threads 18. A threaded tubek 19, which-serves as the discharge nozzle of the pump, is inserted in the terminal2 and is rcrewed into the lower flange 17 The flange 16 has an annular recess 2()V into which packing 21 is placed to renderv airtightthespace between flange 16 and tube 19, said'packing being held in place .by a ring 22 secured against the flange byv cap screws 23. A n adf justment nut or collar 24 is inserted intothe terminal 2 through a hand-hole 25 in the side thereof, and the tube 19 before entering the flange 17 is passed through saidcollar which bears against the flange and may be locked on the tube by a set screw 26. When the pump is in use the hose 5 prevents access to the tube 19in order to adjust the same to and from the nozzle 15. This adjustment may, however, be effected by the collar 24. If the operator wishes to withdraw the tube he merely turns the collar 24 to the left, whereupon the tube 1.9 is screwed out of the flange 17 the desired amount. Should one wish tobring the tube closer to the nozzle the set screw 26 is unscrewed whereupon the collar 24 is turned to the left to cause itto move upwardly on the tube, after which the set screw is made tight and the collar then turned to the right by screwing the tube into It will be observed that the ends of tube 19 flare outwardly, the flaring mouth 19 of the tube having an object that will appear in the description ofthe operation of the invention, as follows:

lVe will assume that the pump is to be used by firemen to pump the water from the s .ma a ingangen nga veia-ity from nozzle 15 and injected into tube 19. Obviously, the air is exhausted from the bowl '1 and the valve BOforced open by the 'pressure of Water behind it. The air is forced through tube 19 and has a tendency to cushion at the mouth of the tube. By flaring the mouth 19 (as shown) this cushioning eltect is avoided. Having expelled the air from the bowl, tube 19, and the hose 5, a. Siphon is created and the Water rushes into the pump, past valve 30, andis discharged through tube 19 and hose 5. The city Water pressure behind the hydrant may vary between Wide limits, anywhere from 2() to 90 lbs., consequentlyto obtain the greatest eiiiciency from the pump the tubev 19 must be adjusted toobtain the relative positions of tube and injector nozzle '15 best suited to the pressure at the time. Y l

Another feature of our invention is that ythe Water to be pumped passes through the pumpin-a straight line thus avoiding loss of Velocity through turns or bends. The

strainer, obviously, is to prevent the passage of large solid objects into the pump and cause it to clog. HOW/ever, should an obstruction occur in the hose 5 or Should suction be interrupted through any cause the valve 30 Will immediately close to prevent the Water from the hydrant from backflowing into the cellar. Thus, after placing the pump in operation, it may safely-be allowed to operate Withoutattention.

VHaving described ourinvention, We claim: A siphon pump comprisingr a housing having a substantially` cylindrical terminal at one end and an inlet at the opposite end, a

discharge tube disposed Within said termiv nal, an injector nozzle Within thehousing, means for connecting said nozzle with a source 'ot fluentv medium under pressure, an

adjusting collar mounted on thevtube, and

said terminal having a hand-hole whereby .f

access to the collar may be hadfor effecting adjustment of the'tube While the pump is in operation.

In testimony whereof We hereunto aiiix our signatures.

WILLIAM MoDRA. ALFRED W. MEIER. 

